28539561960 has 768 divisors, whose sum is σ = 121709952000. Its totient is φ = 5752276992.

The previous prime is 28539561943. The next prime is 28539561991. The reversal of 28539561960 is 6916593582.

It is a happy number.

28539561960 is a `hidden beast` number, since 28 + 53 + 9 + 561 + 9 + 6 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28539561897 and 28539561906.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 36920134 + ... + 36920906.

It is an arithmetic number, because the mean of its divisors is an integer number (158476500).

Almost surely, 2^28539561960 is an apocalyptic number.

28539561960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28539561960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60854976000).

28539561960 is an abundant number, since it is smaller than the sum of its proper divisors (93170390040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28539561960 is a wasteful number, since it uses less digits than its factorization.

28539561960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 826 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 28539561960 in words is "twenty-eight billion, five hundred thirty-nine million, five hundred sixty-one thousand, nine hundred sixty".